Strip steel passivation tank for fine blanking material production and passivation method thereof

Abstract

The invention discloses a strip steel passivation tank for fine blanking material production and a passivation method thereof. According to the passivation method, a low temperature passivation tank and a high temperature passivation tank are arranged in sequence; strip steel, which has been acid-washed and cleaned, is made to go through the low temperature passivation tank and the high temperature passivation tank in sequence; the low temperature passivation liquid and the residual pickling solution on the surface of the strip steel carry out neutralization reactions, the residual pickling solution is removed, the surface antirust goal is realized; after the strip steel goes through the high temperature passivation liquid, the strip steel obtains a certain temperature, after the strip steel is taken out of the high temperature passivation liquid, the water on the surface of the strip steel evaporates automatically; the happening rate of rust generation on the surface of the strip steel is further reduced; the surface quality during the strip steel production process is improved, and the requirements of users are met.

Description

technical field [0001] The invention relates to the treatment technology before cold rolling in the production of fine blanking materials, and more specifically relates to a passivation tank for producing fine blanking materials and a passivation method thereof. Background technique [0002] Fine blanking materials generally include carbon structural steel, carbon tool steel, alloy structural steel, alloy tool steel, spring steel and other materials. , pickling, cleaning, drying, cold rolling, annealing and smoothing and other process steps. At present, most of the conventional raw materials are hot-rolled sheets with a thickness of 2-12 mm. With the diversification of products and the continuous improvement of product performance, it is necessary to use hot-rolled sheets with a thickness of more than 12 mm (12 mm to 16 mm) as raw materials. , In this way, higher requirements will be put forward for the entire cold rolling production line, especially for each treatment proc...

AI Technical Summary

Problems solved by technology

[0003] At present, after the strip steel is pickled and spray cleaned, it is generally dried by a fan, but it is found in the actual production process that pickling liquid and water will still remain on the strip steel after pickling and cleaning, which is easy to Rust, it will rust after 1 hour of normal parking. Once rust occurs, it cannot enter the subsequent process for cold rolling. Because the rust will be rolled to the surface of the material, it will become a black color difference zone after annealing, so it cannot meet the requirements. user request

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